<template>
  <div class="container">
    <div class="left-board">
      <el-scrollbar class="left-scrollbar">
        <div class="filter-container">
          <el-button-group>
            <el-button v-if="manager_btn_add" type="primary" icon="plus" @click="handlerAdd" label="plus">添加</el-button>
            <el-button v-if="manager_btn_edit" type="primary" icon="edit" @click="handlerEdit" label="edit">编辑</el-button>
            <el-button v-if="manager_btn_del" type="primary" icon="delete" @click="handleDelete" label="delete">删除</el-button>
          </el-button-group>
        </div>

        <el-col style="margin-top:15px;">
          <el-tree :data="treeData" :props="defaultProps" :filter-node-method="filterNode" class="filter-tree" node-key="id"
            highlight-current default-expand-all @node-click="getNodeData" />
        </el-col>
      </el-scrollbar>
    </div>
    <div class="center-board">
      <div class="action-bar">
        <!-- <el-button icon="el-icon-download" type="text" @click="download">
          导出vue文件
        </el-button>
        <el-button class="copy-btn-main" icon="el-icon-document-copy" type="text" @click="copy">
          复制代码
        </el-button> -->
        <el-button v-if="formStatus == 'create'" type="primary" @click="create" v-prevent-re-click>保存</el-button>
        <el-button v-if="formStatus == 'update'" type="primary" @click="update" v-prevent-re-click>更新</el-button>
      </div>
      <el-scrollbar class="center-scrollbar">
        <el-row class="center-board-row" :gutter="formConf.gutter">
          <el-form :size="formConf.size" :label-position="formConf.labelPosition" :disabled="formConf.disabled"
            :label-width="formConf.labelWidth + 'px'">
            <draggable class="drawing-board" :list="drawingList" :animation="340" group="componentsGroup">
              <draggable-item v-for="(element, index) in drawingList" :key="element.renderKey" :drawing-list="drawingList"
                :element="element" :index="index" :active-id="activeId" :form-conf="formConf" @activeItem="activeFormItem"
                @copyItem="drawingItemCopy" @deleteItem="drawingItemDelete" />
            </draggable>
            <div v-show="!drawingList.length" class="empty-info">
              从左侧拖入或点选组件进行表单设计
            </div>
          </el-form>
        </el-row>
      </el-scrollbar>
    </div>
    <right-panel :active-data="activeData" :form-conf="formConf" :show-field="!!drawingList.length" @tag-change="tagChange" />
    <code-type-dialog :visible.sync="dialogVisible" title="选择生成类型" :show-file-name="showFileName" @confirm="generate" />
    <input id="copyNode" type="hidden">
  </div>

</template>

<script>
  import draggable from 'vuedraggable'
  import {
    saveAs
  } from 'file-saver'
  import beautifier from 'js-beautify'
  import ClipboardJS from 'clipboard'
  import {
    fetchList,
    delObj,
    getObj,
    addObj,
    putObj,
    fetchField
  } from '@/api/def/checkField'
  import render from '@/util/generator/render'
  import RightPanel from './RightPanel'
  import {
    inputComponents,
    selectComponents,
    layoutComponents,
    formConf
  } from '@/util/generator/config'
  import {
    exportDefault,
    beautifierConf,
    isNumberStr,
    titleCase
  } from '@/util/index'
  import {
    makeUpHtml,
    vueTemplate,
    vueScript,
    cssStyle
  } from '@/util/generator/html'
  import {
    makeUpJs
  } from '@/util/generator/js'
  import {
    makeUpCss
  } from '@/util/generator/css'
  import drawingDefalut from '@/util/generator/drawingDefalut'
  import CodeTypeDialog from './CodeTypeDialog'
  import DraggableItem from './DraggableItem'

  import {
    mapGetters,
    Store
  } from "vuex";
  const emptyActiveData = {
    style: {},
    autosize: {}
  }
  let oldActiveId
  let tempActiveData

  export default {
    components: {
      draggable,
      render,
      RightPanel,
      CodeTypeDialog,
      DraggableItem
    },
    data() {
      var validList = (rule, value, callback) => {
        if (this.validateType == "添加") {
          this.query({
              id: this.currentId,
              type: this.form.type,
              paraType: rule.field.toUpperCase(),
              para: value
            },
            rule,
            value,
            callback
          );
        } else if (this.validateType == "编辑") {
          this.query({
              type: this.form.type,
              paraType: rule.field.toUpperCase(),
              para: value
            },
            rule,
            value,
            callback
          );
        }
      };
      return {
        //右边对应的属性
        idGlobal: 100,
        formConf,
        inputComponents,
        selectComponents,
        layoutComponents,
        labelWidth: 100,
        drawingList: drawingDefalut,
        drawingData: {},
        activeId: drawingDefalut[0].id,
        drawerVisible: false,
        formData: {},
        dialogVisible: false,
        generateConf: null,
        showFileName: false,
        activeData: drawingDefalut[0],
        list: null,
        queryCode: 1,
        parentId: null,
        formEdit: true,
        formStatus: "",
        showElement: false,
        validateType: "",
        treeDeptData: [],
        typeOptions: ["0", "1"],
        methodOptions: ["GET", "POST", "PUT", "DELETE"],
        listQuery: {
          name: undefined
        },
        treeData: [],
        defaultProps: {
          children: "children",
          label: "name"
        },
        idNameProps: {
          label: 'name',
          value: 'id'
        },
        unitOptions: [],
        rules: {
          parentId: [{
            required: true,
            message: "请输入父级节点",
            trigger: "blur"
          }],
          relId: [{
            required: true,
            message: "请选择关联信息",
            trigger: "blur"
          }],
          //id: [{ required: true, message: "请输入节点编号", trigger: "blur" }],
          name: [{
              required: true,
              message: "请输入部门名称",
              trigger: "blur"
            },
            {
              min: 1,
              max: 32,
              message: "长度在 1 到 32 个字符",
              trigger: "blur"
            },
            {
              validator: validList,
              trigger: "blur"
            }
          ],
          code: [{
              required: true,
              message: "请输入编码",
              trigger: "blur"
            },
            {
              validator: validList,
              trigger: "blur"
            }
          ],
          fullName: [{
            required: true,
            message: "请输入名称",
            trigger: "blur"
          }],
          number: [{
              required: true,
              message: "请输入编号",
              trigger: "blur"
            },
            {
              validator: validList,
              trigger: "blur"
            }
          ],
          type: [{
            required: true,
            message: "请输入类型",
            trigger: "blur"
          }]
        },
        labelPosition: "right",
        currentDataType: "",
        currentId: 0,
        groupId: 0,
        manager_btn_add: false,
        manager_btn_edit: false,
        manager_btn_del: false
      };
    },
    created() {
      this.getList();
      this.manager_btn_add = this.permissions["def_checkfield_add"];
      this.manager_btn_edit = this.permissions["def_checkfield_edit"];
      this.manager_btn_del = this.permissions["def_checkfield_del"];
    },
    computed: {
      ...mapGetters(["elements", "permissions"])
    },
    watch: {
      // eslint-disable-next-line func-names
      'activeData.label': function(val, oldVal) {
        if (
          this.activeData.placeholder === undefined ||
          !this.activeData.tag ||
          oldActiveId !== this.activeId
        ) {
          return
        }
        this.activeData.placeholder = this.activeData.placeholder.replace(oldVal, '') + val
      },
      activeId: {
        handler(val) {
          oldActiveId = val
        },
        immediate: true
      }
    },
    methods: {
      getList() {
        fetchField(this.listQuery).then(response => {
          this.treeData = response.data.data;
        });
      },
      filterNode(value, data) {
        if (!value) return true;
        return data.label.indexOf(value) !== -1;
      },
      getNodeData(data) {
        this.currentDataType = data.type;
        if (data.type == 'field') {
          if (!this.formEdit) {
            this.formStatus = "update";
          }
          getObj(data.dataId).then(response => {
            this.activeData = response.data.data
              this.activeData.style=JSON.parse(this.activeData.style)
              this.activeData.renderKey = +new Date()
              this.drawingList = []
              this.drawingList.push(this.activeData)
              this.activeId=data.dataId
          });
          this.currentId = data.dataId;
          this.groupId = data.parentId;
          this.showElement = true;
        } else {
          this.groupId = data.id;
        }
      },
      handlerEdit(value) {
        this.validateType = value.target.innerText;
        if (this.activeData.id) {
          this.formStatus = "update";
        }
      },
      handlerAdd(value) {
        this.validateType = value.target.innerText;
        this.activeData = drawingDefalut[0];
        this.formStatus = "create";
      },
      handleDelete(value) {
        this.validateType = value.target.innerText;
        this.$confirm("此操作将永久删除, 是否继续?", "提示", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }).then(() => {
          delObj(this.currentId).then(() => {
            this.getList();
            this.resetForm();
            this.onCancel();
            this.$notify({
              title: "成功",
              message: "删除成功",
              type: "success",
              duration: 2000
            });
          });
        });
      },
      update() {
        this.activeData.style = JSON.stringify(this.activeData.style)
        putObj(this.activeData).then(() => {
          this.getList();
          this.$notify({
            title: "成功",
            message: "更新成功",
            type: "success",
            duration: 2000
          });
        });

      },
      create() {
        this.activeData.groupId = this.groupId
        this.activeData.style = JSON.stringify(this.activeData.style)
        addObj(this.activeData).then(() => {
          this.getList();
          this.$notify({
            title: "成功",
            message: "创建成功",
            type: "success",
            duration: 2000
          });
        });
      },

      onCancel() {
        this.formEdit = true;
        this.formStatus = "";
      },
      resetForm() {
        this.form = {
          parentId: this.currentId
        };
      },
      activeFormItem(element) {
        this.activeData = element
        this.activeId = element.formId
      },
      onEnd(obj, a) {
        if (obj.from !== obj.to) {
          this.activeData = tempActiveData
          this.activeId = this.idGlobal
        }
      },
      addComponent(item) {
        const clone = this.cloneComponent(item)
        this.drawingList.push(clone)
        this.activeFormItem(clone)
      },
      cloneComponent(origin) {
        const clone = JSON.parse(JSON.stringify(origin))
        clone.formId = ++this.idGlobal
        clone.span = formConf.span
        clone.renderKey = +new Date() // 改变renderKey后可以实现强制更新组件
        if (!clone.layout) clone.layout = 'colFormItem'
        if (clone.layout === 'colFormItem') {
          clone.fieldProp = `field${this.idGlobal}`
          clone.placeholder !== undefined && (clone.placeholder += clone.label)
          tempActiveData = clone
        } else if (clone.layout === 'rowFormItem') {
          delete clone.label
          clone.componentName = `row${this.idGlobal}`
          clone.gutter = this.formConf.gutter
          tempActiveData = clone
        }
        return tempActiveData
      },
      AssembleFormData() {
        this.formData = {
          fields: JSON.parse(JSON.stringify(this.drawingList)),
          ...this.formConf
        }
      },
      generate(data) {
        const func = this[`exec${titleCase(this.operationType)}`]
        this.generateConf = data
        func && func(data)
      },
      execRun(data) {
        this.AssembleFormData()
        this.drawerVisible = true
      },
      execDownload(data) {
        const codeStr = this.generateCode()
        const blob = new Blob([codeStr], {
          type: 'text/plain;charset=utf-8'
        })
        saveAs(blob, data.fileName)
      },
      execCopy(data) {
        document.getElementById('copyNode').click()
      },
      drawingItemCopy(item, parent) {
        let clone = JSON.parse(JSON.stringify(item))
        clone = this.createIdAndKey(clone)
        parent.push(clone)
        this.activeFormItem(clone)
      },
      createIdAndKey(item) {
        item.formId = ++this.idGlobal
        item.renderKey = +new Date()
        if (item.layout === 'colFormItem') {
          item.fieldProp = `field${this.idGlobal}`
        } else if (item.layout === 'rowFormItem') {
          item.componentName = `row${this.idGlobal}`
        }
        if (Array.isArray(item.children)) {
          item.children = item.children.map(childItem => this.createIdAndKey(childItem))
        }
        return item
      },
      drawingItemDelete(index, parent) {
        parent.splice(index, 1)
        this.$nextTick(() => {
          const len = this.drawingList.length
          if (len) {
            this.activeFormItem(this.drawingList[len - 1])
          }
        })
      },
      generateCode() {
        const {
          type
        } = this.generateConf
        this.AssembleFormData()
        const script = vueScript(makeUpJs(this.formData, type))
        const html = vueTemplate(makeUpHtml(this.formData, type))
        const css = cssStyle(makeUpCss(this.formData))
        return beautifier.html(html + script + css, beautifierConf.html)
      },
      download() {
        this.dialogVisible = true
        this.showFileName = true
        this.operationType = 'download'
      },
      run() {
        this.dialogVisible = true
        this.showFileName = false
        this.operationType = 'run'
      },
      copy() {
        this.dialogVisible = true
        this.showFileName = false
        this.operationType = 'copy'
      },
      tagChange(newTag) {
        newTag = this.cloneComponent(newTag)
        newTag.fieldProp = this.activeData.fieldProp
        newTag.formId = this.activeId
        newTag.span = this.activeData.span
        delete this.activeData.tag
        delete this.activeData.tagIcon
        delete this.activeData.document
        Object.keys(newTag).forEach(key => {
          if (this.activeData[key] !== undefined &&
            typeof this.activeData[key] === typeof newTag[key]) {
            newTag[key] = this.activeData[key]
          }
        })
        this.activeData = newTag
        this.updateDrawingList(newTag, this.drawingList)
      },
      updateDrawingList(newTag, list) {
        const index = list.findIndex(item => item.formId === this.activeId)
        if (index > -1) {
          list.splice(index, 1, newTag)
        } else {
          list.forEach(item => {
            if (Array.isArray(item.children)) this.updateDrawingList(newTag, item.children)
          })
        }
      }
    }
  };
</script>

<style lang='scss'>
  body,
  html {
    margin: 0;
    padding: 0;
    background: #fff;
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji;
  }

  input,
  textarea {
    font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji;
  }

  .editor-tabs {
    background: #121315;

    .el-tabs__header {
      margin: 0;
      border-bottom-color: #121315;

      .el-tabs__nav {
        border-color: #121315;
      }
    }

    .el-tabs__item {
      height: 32px;
      line-height: 32px;
      color: #888a8e;
      border-left: 1px solid #121315 !important;
      background: #363636;
      margin-right: 5px;
      user-select: none;
    }

    .el-tabs__item.is-active {
      background: #1e1e1e;
      border-bottom-color: #1e1e1e !important;
      color: #fff;
    }

    .el-icon-edit {
      color: #f1fa8c;
    }

    .el-icon-document {
      color: #a95812;
    }
  }

  // home
  .right-scrollbar {
    .el-scrollbar__view {
      padding: 12px 18px 15px 15px;
    }
  }

  .left-scrollbar .el-scrollbar__wrap {
    box-sizing: border-box;
    overflow-x: hidden !important;
    margin-bottom: 0 !important;
  }

  .center-tabs {
    .el-tabs__header {
      margin-bottom: 0 !important;
    }

    .el-tabs__item {
      width: 50%;
      text-align: center;
    }

    .el-tabs__nav {
      width: 100%;
    }
  }

  .reg-item {
    padding: 12px 6px;
    background: #f8f8f8;
    position: relative;
    border-radius: 4px;

    .close-btn {
      position: absolute;
      right: -6px;
      top: -6px;
      display: block;
      width: 16px;
      height: 16px;
      line-height: 16px;
      background: rgba(0, 0, 0, 0.2);
      border-radius: 50%;
      color: #fff;
      text-align: center;
      z-index: 1;
      cursor: pointer;
      font-size: 12px;

      &:hover {
        background: rgba(210, 23, 23, 0.5)
      }
    }

    &+.reg-item {
      margin-top: 18px;
    }
  }

  .action-bar {
    & .el-button+.el-button {
      margin-left: 15px;
    }

    & i {
      font-size: 20px;
      vertical-align: middle;
      position: relative;
      top: -1px;
    }
  }

  .custom-tree-node {
    width: 100%;
    font-size: 14px;

    .node-operation {
      float: right;
    }

    i[class*="el-icon"]+i[class*="el-icon"] {
      margin-left: 6px;
    }

    .el-icon-plus {
      color: #409EFF;
    }

    .el-icon-delete {
      color: #157a0c;
    }
  }

  .left-scrollbar .el-scrollbar__view {
    overflow-x: hidden;
  }

  .el-rate {
    display: inline-block;
    vertical-align: text-top;
  }

  .el-upload__tip {
    line-height: 1.2;
  }

  $selectedColor: #f6f7ff;
  $lighterBlue: #409EFF;

  .container {
    position: relative;
    width: 100%;
    height: 100%;
  }

  .components-list {
    padding: 8px;
    box-sizing: border-box;
    height: 100%;

    .components-item {
      display: inline-block;
      width: 48%;
      margin: 1%;
      transition: transform 0ms !important;
    }
  }

  .components-draggable {
    padding-bottom: 20px;
  }

  .components-title {
    font-size: 14px;
    color: #222;
    margin: 6px 2px;

    .svg-icon {
      color: #666;
      font-size: 18px;
    }
  }

  .components-body {
    padding: 8px 10px;
    background: $selectedColor;
    font-size: 12px;
    cursor: move;
    border: 1px dashed $selectedColor;
    border-radius: 3px;

    .svg-icon {
      color: #777;
      font-size: 15px;
    }

    &:hover {
      border: 1px dashed #787be8;
      color: #787be8;

      .svg-icon {
        color: #787be8;
      }
    }
  }

  .left-board {
    width: 260px;
    position: absolute;
    left: 0;
    top: 0;
    height: 100vh;
  }

  .left-scrollbar {
    height: calc(100vh - 42px);
    overflow: hidden;
  }

  .center-scrollbar {
    height: calc(100vh - 42px);
    overflow: hidden;
    border-left: 1px solid #f1e8e8;
    border-right: 1px solid #f1e8e8;
    box-sizing: border-box;
  }

  .center-board {
    height: 100vh;
    width: auto;
    margin: 0 350px 0 260px;
    box-sizing: border-box;
  }

  .empty-info {
    position: absolute;
    top: 46%;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 18px;
    color: #ccb1ea;
    letter-spacing: 4px;
  }

  .action-bar {
    position: relative;
    height: 42px;
    text-align: right;
    padding: 0 15px;
    box-sizing: border-box;
    ;
    border: 1px solid #f1e8e8;
    border-top: none;
    border-left: none;

    .delete-btn {
      color: #F56C6C;
    }
  }

  .logo-wrapper {
    position: relative;
    height: 42px;
    background: #fff;
    border-bottom: 1px solid #f1e8e8;
    box-sizing: border-box;
  }

  .logo {
    position: absolute;
    left: 12px;
    top: 6px;
    line-height: 30px;
    color: #00afff;
    font-weight: 600;
    font-size: 17px;
    white-space: nowrap;

    >img {
      width: 30px;
      height: 30px;
      vertical-align: top;
    }

    .github {
      display: inline-block;
      vertical-align: sub;
      margin-left: 15px;

      >img {
        height: 22px;
      }
    }
  }

  .center-board-row {
    padding: 12px 12px 15px 12px;
    box-sizing: border-box;

    &>.el-form {
      // 69 = 12+15+42
      height: calc(100vh - 69px);
    }
  }

  .drawing-board {
    height: 100%;
    position: relative;

    .components-body {
      padding: 0;
      margin: 0;
      font-size: 0;
    }

    .sortable-ghost {
      position: relative;
      display: block;
      overflow: hidden;

      &::before {
        content: " ";
        position: absolute;
        left: 0;
        right: 0;
        top: 0;
        height: 3px;
        background: rgb(89, 89, 223);
        z-index: 2;
      }
    }

    .components-item.sortable-ghost {
      width: 100%;
      height: 60px;
      background-color: $selectedColor;
    }

    .active-from-item {
      &>.el-form-item {
        background: $selectedColor;
        border-radius: 6px;
      }

      &>.drawing-item-copy,
      &>.drawing-item-delete {
        display: initial;
      }

      &>.component-name {
        color: $lighterBlue;
      }
    }

    .el-form-item {
      margin-bottom: 15px;
    }
  }

  .drawing-item {
    position: relative;
    cursor: move;

    &.unfocus-bordered:not(.activeFromItem)>div:first-child {
      border: 1px dashed #ccc;
    }

    .el-form-item {
      padding: 12px 10px;
    }
  }

  .drawing-row-item {
    position: relative;
    cursor: move;
    box-sizing: border-box;
    border: 1px dashed #ccc;
    border-radius: 3px;
    padding: 0 2px;
    margin-bottom: 15px;

    .drawing-row-item {
      margin-bottom: 2px;
    }

    .el-col {
      margin-top: 22px;
    }

    .el-form-item {
      margin-bottom: 0;
    }

    .drag-wrapper {
      min-height: 80px;
    }

    &.active-from-item {
      border: 1px dashed $lighterBlue;
    }

    .component-name {
      position: absolute;
      top: 0;
      left: 0;
      font-size: 12px;
      color: #bbb;
      display: inline-block;
      padding: 0 6px;
    }
  }

  .drawing-item,
  .drawing-row-item {
    &:hover {
      &>.el-form-item {
        background: $selectedColor;
        border-radius: 6px;
      }

      &>.drawing-item-copy,
      &>.drawing-item-delete {
        display: initial;
      }
    }

    &>.drawing-item-copy,
    &>.drawing-item-delete {
      display: none;
      position: absolute;
      top: -10px;
      width: 22px;
      height: 22px;
      line-height: 22px;
      text-align: center;
      border-radius: 50%;
      font-size: 12px;
      border: 1px solid;
      cursor: pointer;
      z-index: 1;
    }

    &>.drawing-item-copy {
      right: 56px;
      border-color: $lighterBlue;
      color: $lighterBlue;
      background: #fff;

      &:hover {
        background: $lighterBlue;
        color: #fff;
      }
    }

    &>.drawing-item-delete {
      right: 24px;
      border-color: #F56C6C;
      color: #F56C6C;
      background: #fff;

      &:hover {
        background: #F56C6C;
        color: #fff;
      }
    }
  }
</style>
